From b5fd68d5c45ab2c378b55c68a5eed64558958b0e Mon Sep 17 00:00:00 2001
From: JHLEE325 <82587652+JHLEE325@users.noreply.github.com>
Date: Sat, 28 Feb 2026 14:17:22 +0900
Subject: [PATCH] =?UTF-8?q?[20260228]=20BOJ=20/=20G4=20/=20=EC=B2=B4?=
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---
 ...\354\271\240\355\225\230\352\270\260 2.md" | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 "JHLEE325/202602/28 BOJ G4 \354\262\264\354\212\244\355\214\220 \353\213\244\354\213\234 \354\271\240\355\225\230\352\270\260 2.md"

diff --git "a/JHLEE325/202602/28 BOJ G4 \354\262\264\354\212\244\355\214\220 \353\213\244\354\213\234 \354\271\240\355\225\230\352\270\260 2.md" "b/JHLEE325/202602/28 BOJ G4 \354\262\264\354\212\244\355\214\220 \353\213\244\354\213\234 \354\271\240\355\225\230\352\270\260 2.md"
new file mode 100644
index 00000000..b23df43e
--- /dev/null
+++ "b/JHLEE325/202602/28 BOJ G4 \354\262\264\354\212\244\355\214\220 \353\213\244\354\213\234 \354\271\240\355\225\230\352\270\260 2.md"	
@@ -0,0 +1,54 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int N, M, K;
+    static char[][] board;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        K = Integer.parseInt(st.nextToken());
+
+        board = new char[N + 1][M + 1];
+        for (int i = 1; i <= N; i++) {
+            String line = br.readLine();
+            for (int j = 1; j <= M; j++) {
+                board[i][j] = line.charAt(j - 1);
+            }
+        }
+
+        System.out.println(Math.min(coloring('B'), coloring('W')));
+    }
+
+    static int coloring(char start) {
+        int[][] sum = new int[N + 1][M + 1];
+
+        for (int i = 1; i <= N; i++) {
+            for (int j = 1; j <= M; j++) {
+                int value = 0;
+                if ((i + j) % 2 == 0) {
+                    if (board[i][j] != start) value = 1;
+                } else {
+                    if (board[i][j] == start) value = 1;
+                }
+
+                sum[i][j] = sum[i - 1][j] + sum[i][j - 1] - sum[i - 1][j - 1] + value;
+            }
+        }
+
+        int painting = Integer.MAX_VALUE;
+        for (int i = K; i <= N; i++) {
+            for (int j = K; j <= M; j++) {
+                int count = sum[i][j] - sum[i - K][j] - sum[i][j - K] + sum[i - K][j - K];
+                painting = Math.min(painting, count);
+            }
+        }
+        return painting;
+    }
+}
+```